Whatever you do, do NOT buy your car insurance from Zurich. Absolutely abysmal service I am having at the moment.
On the other hand, I have nothing but praise for Norwich Union and I have my own and my wife's cars insured with them. Works car is insured with Zurich and you'd think, with 8 cars each costing betwixt £1300 and £1500 per year, they'd do what they promised wouldn't you? They haven't.